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3 years ago

If x = 6 and y = -4, evaluate 3x2 - 5y

Mathematics

2 answers:

guajiro [1.7K]3 years ago

8 0

Answer:

the answer is 56

Step-by-step explanation:

3×6×2= 36 and 5×-4=-20. 36-(-20) is 56

Elza [17]3 years ago

3 0

Answer:

solution = 128

Step-by-step explanation:

if x = 6 , y = -4

then,

( 3 × 6 × 6 ) - ( 5 × -4 )
108 + 20
128

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Question Category: Solving Quadratic Equations by Factoring Select the correct answer. Find the solution(s) for x in the equatio

Novay_Z [31]

Answer: x = 4; x = 5

Step-by-step explanation:

The directions specify to solve by factoring

x^2 - 9x + 20 = 0

To factor, find two numbers that add to -9 and multiply to 20

-5 and -4 work

-5 + (-4) = -9

-5 * -4 = 20

(x - 4)(x - 5) = 0

x = 4, x =5

6 0

3 years ago

A farmer has a collapsable grain bag which can expand both vertically and horizontally as he needs it to. He wants to find a fun

bija089 [108]

Answer:

$3x^{3}+15x^{2}+x+5$

Step-by-step explanation:

We are told that the area of the bag can be represented by the function $f(x)=3x^{2} +1$ and as the bag is raised up its height can be represented by the function $g(x)=x +5$ .

Since we know that we can find volume of cuboid by multiplying base area to its height. We are given area and height of bag as functions. Now we will find volume of the bag by multiplying these functions.

$\text{Volume of collapsible bag}=f(x)*g(x)$

$\text{Volume of collapsible bag}=(3x^{2}+1)*(x +5)$

After using distributive property we will get,

$\text{Volume of collapsible bag}=3x^{2}(x+5)+1(x+5)$

$\text{Volume of collapsible bag}=3x^{3}+15x^{2}+x+5$

Therefore, the collapsible bag can hold $3x^{3}+15x^{2}+x+5$ grain.

6 0

4 years ago

Pls follow the steps on the image

Darina [25.2K]

Answer:

-4

Step-by-step explanation:

7 0

3 years ago

OMG PLS HELP WITH THIS IM PANICKING OMG I GOT A F IN MATH MY MOM JUST YELLED AT ME IM CRYING PLS HELP WITH THS- PLSS TELL ME WHA

4vir4ik [10]

Answer:

calm down rosie.... it's okay to not be too good at math... take Justin Timberlake. in the show "Friends with Benefits" he's horrible at math but good at life. so don't worry too much. You are still a good person.. even if you're bad at math :P

Step-by-step explanation:

now for the math part

as below